# Kingspan Thermawall TW50 Cavity Wall Board

#### Kingspan Thermawall TW50 Cavity Wall Insulation Board – 1200mm x 450mm

####  [Data Sheet](https://cdn.shopify.com/s/files/1/0705/2869/6596/files/kingspan-thermawall-tw50-brochure-en-gb.pdf?v=1731063713)

**Kingspan Thermawall TW50** is a **high-performance partial fill cavity wall insulation board** designed to improve thermal efficiency in masonry cavity wall constructions. Manufactured with a **rigid thermoset PIR insulation core** and faced on both sides with a **low emissivity composite foil**, TW50 helps deliver excellent thermal performance while offering good resistance to moisture and water vapour.

This **Kingspan cavity wall insulation** is ideal for **partially filled cavity walls**, helping create a dependable barrier against rain penetration while maintaining strong insulating performance. Thanks to its **low thermal conductivity** and **moisture-resistant properties**, Kingspan TW50 is a popular choice for builders, contractors, and developers looking for reliable **PIR insulation boards** for wall applications.

Whether you are working on a new build or a renovation project, **Kingspan Thermawall TW50 insulation boards** provide an effective solution for improving energy efficiency and helping meet modern building performance requirements.

### Key Features

-   High-performance **partial fill cavity wall insulation**
    
-   Rigid **PIR insulation board**
    
-   Low emissivity composite foil facing on both sides
    
-   Excellent **thermal insulation performance**
    
-   Helps reduce heat loss through cavity walls
    
-   Moisture-resistant with low water vapour permeability
    
-   Suitable for use in **masonry cavity wall applications**
    
-   Board size: **1200mm x 450mm**
    

### Pack Sizes

Thickness

Boards Per Pack

Pack Coverage

40mm

12

6.48m²

50mm

10

5.40m²

60mm

8

4.32m²

70mm

6

3.24m²

75mm

6

3.24m²

100mm

5

2.70m²

**Please note:**

-   Sold as **full packs only**
    
-   We do **not split packs**
    
-   Please enquire before ordering due to possible **long lead times from Kingspan**
    
-   Lead times may sometimes be around **10–14 working days**

## Details

- **Price:** 60.63 GBP - 82.66 GBP
- **Vendor:** Kingspan
- **Type:** Insulation
- **Tags:** Home & Commercial Insulation, KINGSPAN, Thermawall, TW50

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| 40mm | 82.66 GBP | In stock |
| 50mm | 71.61 GBP | In stock |
| 60mm | 69.76 GBP | In stock |
| 70mm | 60.63 GBP | In stock |
| 75mm | 61.32 GBP | In stock |
| 100mm | 65.30 GBP | In stock |

## Images

- Kingspan Thermawall TW50 Cavity Wall Insulation Board
- Kingspan Thermawall TW50 Cavity Wall Insulation Board

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> Source: [Next Day Insulation](https://nextdayinsulations.com/products/kingspan-tw50-cavity-wall-insulation)
> Updated: 2026-08-20